Boiler



' (No Model.)

- G. F. NILSSON, BOILER,

Patented May 15, 1888'.

W7 smv -h wk/v E, and flues b, in the usual manner.

UNITED STATES PATENT OFFIcs.

GEORGEF. NILSSON, or BELMONT, MASSACHUSETTS.

BOILER.

SPECIFICATION forming part of Letters Patent No. 382,722, dated May15,1888.

Application filed February 23, 1888. Serial No. 264,907. (Yo model.)

To aZZ whom it may concern..-

Be it known thatI, GEORGE F. NILssoN, of

Belmont, in the county of Middlesex, State of Massachusetts,have-invented a certain new and useful Improvement in-Boilers, of which.ing part of this specification, in which Figure 1 is a verticallongitudinal section of my improved boiler and its casing, taken on linemain Fig. 2; and Fig. 2, a vertical trans- ;erse section of the same,taken on line yy in Like letters and figures of referenceindicatecorresponding parts in the different figures of the drawings.

My invention relates more especially to that class of boilers which areused for heating purposes, both with steam and hot water; and itconsists in the certain novel features hereinafter fully set forth andclaimed, the object being to produce a simpler and more effective deviceof this character than is now in ordinary use.

The nature and operation of the improvements will be readily understoodby all conversant with such matters from the following explanation.

In the drawings, A represents the boile r proper, B the chimney orsmoke-stack, O the fire-box, and D the casing, these ,parts being all ofthe ordinary form and construction. The boiler A is also supplied with asteam-dome, A' vertically-arranged pipe, 00, enters the under side ofthe boiler near the rear end thereof, a horizontally-arranged pipe, 2,being centrally conneoted to the lower end of the pipe as and extendingout through the casing D at each side thereof, as shown in Fig. 2. Alongitudinallyarranged inclined pipe, '12, connects each end of the pipe.2 with the end of a horizontally-ar ranged pipe, f, which rests on thebridge-wall H, near the fire-box, and extends through the casing D, saidpipes '12 being also outsidesaid casing. A horizontally-arranged pipe,m, is disposed on the bridge-wall H below the rear end of the boiler,said pipe extending through the.casing D and being provided with a valveor faucet, it, (see Fig. 2,) at one end. Two shortinolined pipes, (seeFig. 1,) connect the ends of the pipe z with those of the pipe' moutside the casing. A horizontally-arranged pipe, h, is disposed beneathand near the head of the boiler, said pipe passing'through the casing D.A vertically-arranged pipe, z, is secured to each end of the pipe h andpasses back through the casing into the boiler..A at

1, or just below the water-line, one end of the pipe h being providedwith a valve or faucet,

1). Eight longitudinally arranged-inclined pipes, q, connect-the pipe hwith the pipe m,

and a corresponding number of vertically-arranged pipes, 1, connect thepipes q with the P f- In the use of my improvement the boiler A isfilled with water, in the usual manner,which passes into and fills thepipes described. Fire being started in the fire box, the pipe h andadjacent portions of the pipe q become heated first, causing the heatedwater in said pipes to rise through the pipesiinto the boiler just belowthe water-line, thereby producing a cir-' culation of water between theboiler-system of pipes beneath it, which becomes continuous.

The heated air, smoke, and products of combustion from the fire-box passin the direction indicated by the arrows in Fig. 1, through the fiues dof the boiler, in the usual manner, thus keepingthe water in said pipesconstantly.

heated to a high-temperatu re. Steam is taken from the boiler A forheating purposes in the usual manner, and by attaching pipes to thevalves 0 t hot water may be conducted to any position desired and acontinuous circulation kept up through the same, as described. Moreover,byusing my system of pipes I find that the boiler A may be constructedabout onethird the size ordinarily required to produce a given result,thus effecting a great saving in the cost of construction.

I do not confine myself to using any specific ICO .body at the rear onthe'under side thereof, a'

transversely-arranged pipe connectedeentrally with said vertical pipeand extending through pipe at the rear of the bridge-wall, and verticalpipes connecting the ends of the transverse pipes and the body of theboiler below the water-line, all being arranged to operate substantiallyas set forth. 2o

2. In a boiler, the body or boiler proper,A. having the flues d and domeE, the vertical pipes at r i, transverse pipes z mf h, inclined pipes qo g, bridge-wall H, and casing D, combined and arranged to operatesubstantially as 25 set forth.

GEORGE F. NILSSON. \Vitnesses:

O. M. SHAW,

E. M. SPINNEY.

